/**
 * Moondance UML modeling tool
 * 
 * This program is free software; you can redistribute it and
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 3
 * of the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

package ro.pub.cs.se.moondance.directedit;

import org.eclipse.jface.viewers.ICellEditorValidator;

/**
 * ICellValidator to validate direct edit values in the connection multiplicity
 * label. Collaborates with an instance of ValidationMessageHandler
 */
public class ConnectionMultiplicityCellEditorValidator implements
		ICellEditorValidator {

	private ValidationMessageHandler handler;

	/**
	 * @param validationMessageHandler
	 *            the validation message handler to pass error information to
	 */
	public ConnectionMultiplicityCellEditorValidator(
			ValidationMessageHandler validationMessageHandler) {
		this.handler = validationMessageHandler;
	}

	/**
	 * @param validation
	 *            of multiplicity value
	 * @return the error message if an error has occurred, otherwise null
	 */

	public String isValid(Object value) {
		@SuppressWarnings("unused")
		String name = (String) value;

		unsetMessageText();
		return null;

	}

	private String unsetMessageText() {
		handler.reset();
		return null;
	}

	@SuppressWarnings("unused")
	private String setMessageText(String text) {
		handler.setMessageText(text);
		return text;
	}

}